MLAB · Mesa Laboratories Inc /Co/
Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.
Insider Sentiment Score
Peer-relative 0–100 rank of how aggressively insiders accumulated over the trailing 90 days. See the full ranking.
| Date | Insider | Role | Type | Security | Shares |
|---|---|---|---|---|---|
| 2026-08-15 | Capone Mark Christopher |
Director |
Convert↑
|
Common Stock
|
2,784 |
| 2026-08-15 | Hall Shannon |
Director |
Convert↑
|
Common Stock
|
2,784 |
| 2026-08-15 | Sullivan John James |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 10 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2026 Not Applicable |
Restricted Stock Units - 10
|
2,784 |
| 2026-08-15 | Capone Mark Christopher |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 3 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2026 Not Applicable |
Restricted Stock Units - 3
|
2,784 |
| 2026-08-15 | Tripeny R Tony |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 4 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2026 Not Applicable |
Restricted Stock Units - 4
|
2,784 |
| 2026-08-15 | Alltoft Jennifer Sadie |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 9 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2026 Not Applicable |
Restricted Stock Units - 9
|
2,784 |
| 2026-08-15 | Tripeny R Tony |
Director |
Convert↑
|
Common Stock
|
2,784 |
| 2026-08-15 | Sullivan John James |
Director |
Convert↑
|
Common Stock
|
2,784 |
| 2026-08-15 | Ladiwala Shiraz Shabanali |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 6 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2026 Not Applicable |
Restricted Stock Units - 6
|
3,810 |
| 2026-08-15 | Alltoft Jennifer Sadie |
Director |
Convert↑
|
Common Stock
|
2,784 |
| 2026-08-15 | Ladiwala Shiraz Shabanali |
Director |
Convert↑
|
Common Stock
|
3,810 |
| 2026-08-15 | Hall Shannon |
Director |
Convert↓
Filing footnotes — Restricted Stock Units - 8 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested on August 15, 2026 Not Applicable |
Restricted Stock Units - 8
|
2,784 |
| 2026-08-13 | Sullivan John James |
Director |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents shares sold directly in a private transaction to Siddhartha Kadia, Mesa President and CEO |
Common Stock
|
7,093 |
| 2026-08-13 | Kadia Siddhartha |
President and CEO |
Buy↑
Filing footnotes — Common Stock (Indirect)
Represents shares purchased directly in a private transaction from John Sullivan, Mesa Board Chair by the Anjou Parekh Lifetime Access Trust for which the reporting person's spouse serves as trustee. Represents shares held by the Anjou Parekh Lifetime Access Trust for which the reporting person's spouse serves as trustee. The reporting person disclaims beneficial ownership of the securities held by the trust except to the extent of his pecuniary interest therein. |
Common Stock
(I)
|
7,093 |
| 2026-08-13 | Tripeny R Tony |
Director |
Buy↑
|
Common Stock
|
900 |
| 2026-06-22 | Archbold Brian David |
SVP Operations |
Sell↓
|
Common Stock
|
2,516 |
| 2026-06-22 | Sakys John |
CFO |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes related to the vesting of RSUs and PSUs on June 18, 2026. Transaction was executed under a 10b5-1 plan. |
Common Stock
|
2,827 |
| 2026-06-22 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes related to the vesting of RSUs and PSUs on June 18, 2026. Transaction was executed under a 10b-1 plan. |
Common Stock
|
442 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↑
|
Common Stock
|
233 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↓
Filing footnotes — Restricted Stock Units - 8 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock Not Applicable RSUs that vest 1/3 on June 15, 2026 and each of the next 2 anniversary dates |
Restricted Stock Units - 8
|
2,480 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↓
Filing footnotes — Restricted Stock Units - 3 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 19, 2025 and each of the next 2 anniversary dates Not Applicable |
Restricted Stock Units - 3
|
368 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↑
|
Common Stock
|
125 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↓
Filing footnotes — Restricted Stock Units - 7 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested June 21, 2024 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 7
|
844 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↓
Filing footnotes — Restricted Stock Units - 2 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 18, 2025 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 2
|
233 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↑
|
Common Stock
|
2,480 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Award↑
Filing footnotes — Common Stock (Direct)
Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
Common Stock
|
1,859 |
| 2026-06-18 | Sakys John |
CFO |
Convert↑
|
Common Stock
|
1,036 |
| 2026-06-18 | Sakys John |
CFO |
Convert↓
Filing footnotes — Restricted Stock Units - 7 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock. RSUs that vest 1/3 on June 15, 2026 and each of the next 2 anniversary dates Not Applicable |
Restricted Stock Units - 7
|
2,756 |
| 2026-06-18 | Sakys John |
CFO |
Convert↓
Filing footnotes — Restricted Stock Units - 6 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock. RSUs that vested June 21, 2024 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 6
|
1,036 |
| 2026-06-18 | Sakys John |
CFO |
Convert↑
|
Common Stock
|
2,756 |
| 2026-06-18 | Archbold Brian David |
SVP Operations |
Convert↑
|
Common Stock
|
844 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↓
Filing footnotes — Restricted Stock Unit - 1 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vested 1/3 on June 21, 2024 and each of the next two anniversary dates Not Applicable |
Restricted Stock Unit - 1
|
125 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Convert↑
|
Common Stock
|
368 |
| 2026-06-18 | Sakys John |
CFO |
Award↑
Filing footnotes — Common Stock (Direct)
Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
Common Stock
|
2,282 |
| 2026-06-18 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Award↑
Filing footnotes — Common Stock (Direct)
Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
Common Stock
|
263 |
| 2026-06-16 | Crennen Lyndsey Elizabeth |
Chief Accounting Officer |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes due on RSU which vested on June 15, 2026 |
Common Stock
|
118 |
| 2026-06-16 | Archbold Brian David |
SVP Operations |
Sell↓
|
Common Stock
|
1,151 |
| 2026-06-16 | Sakys John |
CFO |
Sell↓
Filing footnotes — Common Stock (Direct)
Shares sold to cover taxes related to the vesting of RSUs on June 15, 2026 |
Common Stock
|
1,223 |
| 2026-06-15 | Sakys John |
CFO |
Award↑
Filing footnotes — Restricted Stock Units - 9 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 34% on June 15, 2027, 33% on June 8, 2028 and 33% on June 8, 2029 Not Applicable |
Restricted Stock Units - 9
|
8,416 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Expiration↓
Filing footnotes — Non Qualified Stock Options (Direct)
NSOs that vested 1/3 on each anniversary date of the June 15, 2020 grant date |
Non Qualified Stock Options
|
1,780 |
| 2026-06-15 | Sakys John |
CFO |
Convert↑
|
Common Stock
|
2,717 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Convert↑
|
Common Stock
|
2,454 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Convert↓
Filing footnotes — Restricted Stock Units - 9 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 15, 2026 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units - 9
|
2,454 |
| 2026-06-15 | Sakys John |
CFO |
Convert↓
Filing footnotes — Restricted Stock Units 8 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on June 15, 2026 and each of the next two anniversary dates Not Applicable |
Restricted Stock Units 8
|
2,717 |
| 2026-06-15 | Sakys John |
CFO |
Expiration↓
Filing footnotes — Non Qualified Stock Option (Direct)
NSOs that vested 1/3 on each anniversary date of the June 15, 2020 grant date |
Non Qualified Stock Option
|
3,951 |
| 2026-06-15 | Archbold Brian David |
SVP Operations |
Award↑
Filing footnotes — Restricted Stock Units - 10 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 34% on June 15, 2027, 33% on June 8, 2028 and 33% on June 8 2029 Not Applicable |
Restricted Stock Units - 10
|
4,328 |
| 2026-04-14 | Kadia Siddhartha |
President and CEO |
Award↑
Filing footnotes — Restricted Stock Units - 1 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on each anniversary date Not Applicable |
Restricted Stock Units - 1
|
35,236 |
| 2026-04-14 | Kadia Siddhartha |
President and CEO |
Award↑
Filing footnotes — Restricted Stock Units - 1 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock RSUs that vest 1/3 on each anniversary date Not Applicable |
Restricted Stock Units - 1
|
34,807 |
| 2026-03-31 | Owens Gary M |
President and CEO |
Other↓
Filing footnotes — Restricted Stock Unit - 10 (Direct)
Each RSU represents a contingent right to receive one share of the Issuer's common stock Forfeited shares were due to vest on June 15, 2028. Shares were deemed expired on March 31, 2026 |
Restricted Stock Unit - 10
|
8,211 |
| 2026-03-10 | Capone Mark Christopher |
Director |
Buy↑
|
Common Stock
|
1,301 |